Babych44 Posted May 21, 2019 Report Share Posted May 21, 2019 Car is 1998 Impreza GT, tell stupid what I have to put to settings that shows me wheel speed? Or is it even possibly with this car? Would need it for closed loop idle, and also for gear showing. Sorry my bad english, try to understand Quote Link to comment Share on other sites More sharing options...
cj Posted May 21, 2019 Report Share Posted May 21, 2019 You probbaly dont have ABS sensors on that car to tap into so you wont get individual wheel speeds. Your speedo will be driven by a gearbox sensor. connect the vehicle speed sensor in the gearbox up to any digital input, and configure this as LR wheel speed. Leave the wire connected to the speedo as well, dont just cut it. then under chassis & body, set driven wheel speed source to this DI. Also set non-drive wheel source to the same DI. Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 22, 2019 Report Share Posted May 22, 2019 Also, if you are using our plug-in ECU then the speed sensor should already be set up on DI1 and working by default. Quote Link to comment Share on other sites More sharing options...
Babych44 Posted May 25, 2019 Author Report Share Posted May 25, 2019 Yes, plug-in ECU. WRX-STI, ver 3-4 ecu. Speedo works fine, D1 set to LF Wheel speed, pullup resistor=off, on Speed sources both driven and non driven is LF Wheel speed. Should I wire extra wire from gearbox speed sensor to ecu like "cj" suggested? Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 25, 2019 Report Share Posted May 25, 2019 So assuming your car has a speed sensor like a WRX I would expect it to work. Does LF Wheel speed parameter in the software not show any speed when you are driving? Quote Link to comment Share on other sites More sharing options...
Babych44 Posted May 26, 2019 Author Report Share Posted May 26, 2019 No.. Looking at runtime values or anywhere, no speed at all. In runtime values on "digital input pins" it shows "off" on LF Wheel speed, what does this mean? Quote Link to comment Share on other sites More sharing options...
Stevieturbo Posted May 26, 2019 Report Share Posted May 26, 2019 Does your vehicle speedo work and is connected correctly ? Quote Link to comment Share on other sites More sharing options...
Babych44 Posted May 27, 2019 Author Report Share Posted May 27, 2019 Speedo works ok, dont know about wirings, car is almost stock 1998 -GT Quote Link to comment Share on other sites More sharing options...
Babych44 Posted June 27, 2019 Author Report Share Posted June 27, 2019 Started working when I put pullup resistor ON on digital input 1 settings, it was OFF by default..How novice could know.. Quote Link to comment Share on other sites More sharing options...
HomebuiltRacing Posted March 14, 2020 Report Share Posted March 14, 2020 Hi! I Have similar question. V2 car with speedo cable, all wired to run on v4 ECU. V4 plugin now. Speed is 0 without pull-up, but with pull-up switched on once car is moving readings are inconsistent and jumping +/- 50 km/h. With previous ECU (OEM v4 with daughterboard) speed readings were correct. Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 15, 2020 Report Share Posted March 15, 2020 There is no other setting in the ECU that can affect it. You might have to get an oscilloscope on to the speed wire to see what is wrong with the signal. Im not sure about subaru's, but in Nissans and toyotas from around that same era it is common for the reed switch that generates the signal in the back of the speedo to get sticky/erratic. Quote Link to comment Share on other sites More sharing options...
HomebuiltRacing Posted March 16, 2020 Report Share Posted March 16, 2020 Yes, I understand. Funny enough, VSS wire from speedometer to ECU is also connected to external datalogger and central diff standalone controller, and while diff controller seems to see speed just fine, both ECU and datalogger show noisy signal which does correlate to speed... Attached are screenshots from PC log and from datalogger (together with GPS speed channel). I have v4 speed sensor for gearbox to try wire it directly to ECU, but this means ditching speedo cable and no readings on dash/odometer... Quote Link to comment Share on other sites More sharing options...
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